Allegro MicroSystems A3141 Series - Functional Block Diagram; Electrical Characteristics; Magnetic Characteristics

3141 THRU 3144
SENSITIVE
HALL-EFFECT SWITCHES
FOR HIGH-TEMP. OPERATION
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
FUNCTIONAL BLOCK DIAGRAM
V
CC
X
REG.
Dwg. FH-005-2
GROUND
OUTPUT
3
2
1
MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.
NOTES: Typical values are at T
A
= +25°C and V
CC
= 8 V.
B
OP
= operate point (output turns ON); B
RP
= release point (output turns OFF); B
hys
= hysteresis (B
OP
- B
RP
).
1 gauss (G) is exactly equal to 0.1 millitesla (mT).
*Complete part number includes a suffix to identify operating temperature range (E- or L-) and package type ( -LT or -UA).
ELECTRICAL CHARACTERISTICS at V
CC
= 8 V over operating temperature range.
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
Supply Voltage V
CC
Operating 4.5 — 24 V
Output Saturation Voltage V
OUT(SAT)
I
OUT
= 20 mA, B > B
OP
— 175 400 mV
Output Leakage Current I
OFF
V
OUT
= 24 V, B < B
RP
— <1.0 10 µA
Supply Current I
CC
B < B
RP
(Output OFF) — 4.4 9.0 mA
Output Rise Time t
r
R
L
= 820 Ω, C
L
= 20 pF — 0.04 2.0 µs
Output Fall Time t
f
R
L
= 820 Ω, C
L
= 20 pF — 0.18 2.0 µs
Part Numbers*
A3141– A3142– A3143– A3144–
Characteristic Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
B
OP
at T
A
= 25°C 50 100 160 130 180 230 220 280 340 70 — 350
over operating temp. range 30 100 175 115 180 245 205 280 355 35 — 450
B
RP
at T
A
= 25°C 10 45 130 75 125 175 165 225 285 50 — 330
over operating temp. range 10 45 145 60 125 190 150 225 300 25 — 430
B
hys
at T
A
= 25°C 20 55 80 30 55 80 30 55 80 20 55 —
over operating temp. range 20 55 80 30 55 80 30 55 80 20 55 —
Copyright © 1993, 2002 Allegro MicroSystems, Inc.